.gmenu{display:flex;height:2rem;margin:0 auto;width:980px}.gmenu li{list-style:none;position:relative;z-index:10}.gmenu li a{background:#fff;display:block}.gmenu li li{height:0;overflow:hidden;transition:.5s}.gmenu li li a{border-top:1px solid #eee}.gmenu li:hover>ul>li{height:1.8rem;overflow:visible}.gmenu li ul li ul{left:100%;position:absolute;top:0;width:100%}body>nav.gnav{position:relative;z-index:10000;overflow:visible}body>nav.gnav>sticky{display:block;position:relative;z-index:10001;overflow:visible}body>nav.gnav>sticky>ul.gmenu{position:relative;z-index:10002;overflow:visible}body>nav.gnav>sticky>ul.gmenu ul{position:absolute;z-index:10003}body>.contents{position:relative;z-index:0}